Trump has long tried to portray Clinton as without sufficient stamina to serve as president, despite her reputation as one of the most traveled secretaries of state and profiles detailing her work ethic.

A Clinton campaign spokesperson said Sunday night that Clinton "is the only candidate in the race who has met the standard expected of presidential candidates and provided a detailed medical letter by her long time physician."

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"Donald Trump has put forward a laughable letter that omits basic health information including the date of his exam, past medications, family medical history, heart rate, respiratory rate, EKG, or cholesterol level. Instead of continuing to push discredited conspiracy theories, Donald Trump needs to produce a real doctor's letter, written by a credible doctor, that details the state of his health for voters," Glen Caplin said in a Clinton campaign statement .

"I don't think he's in any better or worse (shape) than the average person that goes and exercises every single day," Trump's doctor, Harold Bornstein, said to NBC when asked about the candidate's health. "Doesn't smoke, doesn't drink -- and that's simply the best advantage you can have to live -- and he's got a good family history."

Clinton's campaign released an annotated version of his letter Monday morning, pointing inconsistencies and apparent typos.

Trump is 70 and Clinton is 68.

Questions about Clinton's health have also been pushed by Trump supporters and surrogates.

Former New York City mayor and Trump surrogate Rudy Giuliani encouraged doubters to "go online and put down 'Hillary Clinton illness.'"

There is absolutely no credible evidence to backstop any of these claims, including on the "videos" Giuliani cited. Clinton's physician -- the only person to speak on the record who has actually examined her -- has repeatedly affirmed the former secretary of state's health and fitness for the highest office in the land.

Clinton recently addressed the claims when she appeared on Jimmy Kimmel's show, calling it "part of the wacky strategy."

But, similar to Trump, Clinton's physician has repeatedly affirmed her health and fitness.

CNN's Gregory Krieg and Theodore Schleifer contributed to this report.